corebos updater does not download any code, that is work for git
with git you update your code, then corebos updater looks at the changes that came from git and updates your database
there are three steps to updating your code

1.- update code: git pull and fix conflicts if they exist
2.- coreBOS updater: load changes
3.- coreBOS updater: apply all (if you really want them all, which is usually the case)